Steam-boiler



(No Model 2 Sheets-Sheet 1.

W.- J. KENNEDY. STEAM BOILER.

No. 423,692. Patented Mar. 18,1890;

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(No Model.) 2 Sheets-Sheet 2.

W. J. KENNEDY.

STEAM BOILER.

No. 423,692. Patented Mar, 18,1890.

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UNITED STATES PATENT OFFICE.

WILLIAM J. KENNEDY, OF JERSEY CITY, NEW JERSEY.

S'TEAM- BOILER.

SPEOIFIOATION forming part of Letters Patent No. 423,692, dated March18, 1890.

Application filed May 15, 1889- To, all whom it may concern.-

Be it known that I, WILLIAM J. KENNEDY, of Jersey City, in the county ofHudson and State of New Jersey, have invented a new and ImprovedSteam-Boiler, of which the following is a full, clear, and exactdescription.

This invention has for its object to provide a new and improved boiler,which is simple, durable, and compact in 'GOllSlJI'llGlilOIl andutilizes the heat to the fullest advantage for generating steam.

The invention consists of certain parts and Figure 1 is asectional sideelevation of the improvement. Fig. 2 is an end elevation of the same,and Fig. 3 is a transverse section of the same, on the line w :r of Fig.1.

The boiler C is composed of a central water-chamber F, provided on twosides with tube-sheets, from which extend watertubes E, which entertube-sheets in the hemispherical end chambers D H, as shown in Fig. 1.-

Steam-pipes I I I rise, respectively, from the chambersD F H andcommunicate with a steam-dome J, from which steam is taken for usethrough pipe K. The lower part of the chamber H communicates by pipe Lwith a mud-drum N, both of which form a leg which supports-the rear endof the boiler on the brick-work O. The boileris centrally supported bythe bridge-wall P, on which the bottom of central chamber F rests. Thefront of the boiler is supported on a front plate B, through which thehemispherical front end D of the boiler projects, said plate alsocarrying door Q to the fire=box Q and door S- to the ash-chamber S, thegrate being indicated by R. The sides, top, and rear of the boiler areinclosed by atcasing B E the chimney being shown at W. At B is a hingedman-hole plate to give access to the interior space between the boilerand casing. The chambers D F H are each provided with man-holes tofacilitate access to the interiors thereof and to the tubesheets for theSerial 110,310,839. (No model.)

cleaning of same, and for the removal and replacing of the tubes, whenrequired. Between the upper surface of the boiler and its casing at T isa fire-wall, as shown in Fig. 1.

The operation is as follows: The products of combustion rise from thefire-box Q and pass between the tubes E and against their connectedtube-sheets, thence in direction of the arrow, around the pipe I andover the central chamber F, thence down between the tubes andtube-sheets of the chamber H and rear end of chamber F to chamber U,thence around the pipe L and drumN to 'passage way V, and thence uparound the rear end of hemispherical chamber H to chimney W.

In the side of the casing at U is a valve to I give access to chamber Nfor cleaning and for admission of air topromote combustion of the gases,if desired.

The construction of my improved boiler with hemispherical ends greatlyadds to the strength of the boiler, and, in connection withthe largesurface exposed to the products of combustion, enables me to produce.aboiler of great steaming-power within comparatively small dimensions.It will be .noticed that the heat comes into'contact with every part ofthe boiler, except the projecting front end and the small part of thecentral chamber F- that rests on the wall P. The products of combustionare thus retained or heldfor a considerable time in contact with theheating-surfaces of the boiler, which renders it highly economical inuse. The passage of the products of combustion in contact with the pipesleading to the steam-drum has a tendency to superheat and dry the steamas it rises from the boiler.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent 1. The combination, with the shell B and thebridge=wall P, of the boiler 0, consisting ',of the compartments D F H,and the tubes E G, connecting the compartments, the compartment D beingon the front of the shell and the compartments F H ,within the shell,the

steam-dome J, outside of the shell, and the pipes I I 1*, connecting thecompartments with the dome, substantially as herein shown and described.

2. The combination, with the shell B, prodrum-N,- under the inner end ofthe boiler and vided with the chimney W, of the boiler 0, connected tothe compartment H by pipe L, 10 formed with the compartments D F H,consubstantially as herein shown and described. nected by tubes E G, thecompartment D be- 5 ing on thefront of the shell and the compart-WILLIAM J. KENNEDY.

ments F H Within the shell, the steam-dome Witnesses: J, outside of theshell and connected to the JOHN J. BOULGER,

compartments by pipes I I I and the mud- WM. A. LANE.

